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< h1 > Creating Meshes< / h1 >
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< p > At first see < a href = "smesh_py_introduction.htm" > Example of 3d mesh generation< / a > , using < b > smesh< / b > package.
< p > Other examples of python scripts will be also updated soon to use < b > smesh< / b > package instead of direct usage of idl interface.
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< h3 > < a name = bookmark > Construction of a Mesh< / a > < / h3 >
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< p > Attention! This script was written using old approach, based on direct usage of SMESH idl interface. To be updated for version 3.2.1 to use < b > smesh< / b > package.
< br >
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< p class = "whs1" > import salome< / p >
< p class = "whs1" > import geompy< / p >
< p class = "whs1" > import StdMeshers< / p >
< p class = "whs1" > smesh = salome.lcc.FindOrLoadComponent(" FactoryServer" ,
" SMESH" )< / p >
< p class = "whs1" > smeshgui = salome.ImportComponentGUI(" SMESH" )< / p >
< p class = "whs1" > smeshgui.Init(salome.myStudyId);< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # create a box< / p >
< p class = "whs1" > box = geompy.MakeBox(0.,
0., 0., 100., 200., 300.)< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # add box to the study< / p >
< p class = "whs1" > idbox = geompy.addToStudy(box,
" box" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # create a hypothesis< / p >
< p class = "whs1" > print " --------------------------
create Hypothesis" < / p >
< p class = "whs1" > print " --------------------------
NumberOfSegments" < / p >
< p class = "whs1" > numberOfSegments
= 7< / p >
< p class = "whs1" > hypNbSeg = smesh.CreateHypothesis(" NumberOfSegments" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > hypNbSeg.SetNumberOfSegments(numberOfSegments)< / p >
< p class = "whs1" > print hypNbSeg.GetName()< / p >
< p class = "whs1" > print hypNbSeg.GetId()< / p >
< p class = "whs1" > print hypNbSeg.GetNumberOfSegments()< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(hypNbSeg),
" NumberOfSegments_10" )< / p >
< p class = "whs1" > print " --------------------------
MaxElementArea" < / p >
< p class = "whs1" > maxElementArea =
800< / p >
< p class = "whs1" > hypArea = smesh.CreateHypothesis(" MaxElementArea" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > hypArea.SetMaxElementArea(maxElementArea)< / p >
< p class = "whs1" > print hypArea.GetName()< / p >
< p class = "whs1" > print hypArea.GetId()< / p >
< p class = "whs1" > print hypArea.GetMaxElementArea()< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(hypArea),
" MaxElementArea_500" )< / p >
< p class = "whs1" > print " --------------------------
MaxElementVolume" < / p >
< p class = "whs1" > maxElementVolume
= 900< / p >
< p class = "whs1" > hypVolume = smesh.CreateHypothesis(" MaxElementVolume" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > hypVolume.SetMaxElementVolume(maxElementVolume)< / p >
< p class = "whs1" > print hypVolume.GetName()< / p >
< p class = "whs1" > print hypVolume.GetId()< / p >
< p class = "whs1" > print hypVolume.GetMaxElementVolume()< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(hypVolume),
" MaxElementVolume_500" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # create algorithms< / p >
< p class = "whs1" > print " --------------------------
create Algorithms" < / p >
< p class = "whs1" > print " --------------------------
Regular_1D" < / p >
< p class = "whs1" > regular1D = smesh.CreateHypothesis(" Regular_1D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(regular1D),
" Wire Discretisation" )< / p >
< p class = "whs1" > print " --------------------------
MEFISTO_2D" < / p >
< p class = "whs1" > mefisto2D = smesh.CreateHypothesis(" MEFISTO_2D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(mefisto2D),
" MEFISTO_2D" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # initialize a mesh with
the box< / p >
< p class = "whs1" > mesh = smesh.CreateMesh(box)< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(mesh),
" MeshBox" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # add the hypothesis to
the box< / p >
< p class = "whs1" > print " --------------------------
add hypothesis to the box" < / p >
< p class = "whs1" > mesh.AddHypothesis(box,hypNbSeg)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,hypArea)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,hypVolume)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,regular1D)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,mefisto2D)< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # compute the mesh< / p >
< p class = "whs1" > print " --------------------------
compute the mesh of the box" < / p >
< p class = "whs1" > ret = smesh.Compute(mesh,box)< / p >
< p class = "whs1" > print ret< / p >
< p class = "whs1" > if ret == 0:< / p >
< p class = "whs1" > print
" probleme when computing the mesh" < / p >
< p class = "whs1" > salome.sg.updateObjBrowser(1)< / p >
< p class = "whs1" > < / p >
< h3 > < a name = bookmark1 > Construction of a Submesh< / a > < / h3 >
< p class = "whs3" > < / p >
< p class = "whs3" > < span style = "font-family: 'Lucida Console', monospace;" > from
geompy import *< / span > < / p >
< p class = "whs3" > import smesh< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # create vertices< / p >
< p class = "whs3" > Point111 = MakeVertex( 0, 0,
0)< / p >
< p class = "whs3" > Point211 = MakeVertex(10, 0,
0)< / p >
< p class = "whs3" > Point121 = MakeVertex( 0, 10, 0)< / p >
< p class = "whs3" > Point221 = MakeVertex(10, 10, 0)< / p >
< p class = "whs3" > Point112 = MakeVertex( 0, 0,
10)< / p >
< p class = "whs3" > Point212 = MakeVertex(10, 0,
10)< / p >
< p class = "whs3" > Point122 = MakeVertex( 0, 10, 10)< / p >
< p class = "whs3" > Point222 = MakeVertex(10, 10, 10)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # create edges< / p >
< p class = "whs3" > EdgeX111 = MakeEdge(Point111, Point211)< / p >
< p class = "whs3" > EdgeX121 = MakeEdge(Point121, Point221)< / p >
< p class = "whs3" > EdgeX112 = MakeEdge(Point112, Point212)< / p >
< p class = "whs3" > EdgeX122 = MakeEdge(Point122, Point222)< / p >
< p class = "whs3" > EdgeY11 = MakeEdge(Point111, Point121)< / p >
< p class = "whs3" > EdgeY21 = MakeEdge(Point211, Point221)< / p >
< p class = "whs3" > EdgeY12 = MakeEdge(Point112, Point122)< / p >
< p class = "whs3" > EdgeY22 = MakeEdge(Point212, Point222)< / p >
< p class = "whs3" > EdgeZ111 = MakeEdge(Point111, Point112)< / p >
< p class = "whs3" > EdgeZ211 = MakeEdge(Point211, Point212)< / p >
< p class = "whs3" > EdgeZ121 = MakeEdge(Point121, Point122)< / p >
< p class = "whs3" > EdgeZ221 = MakeEdge(Point221, Point222)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # create faces< / p >
< p class = "whs3" > FaceX11 = MakeQuad(EdgeY11, EdgeZ111,
EdgeY12, EdgeZ121)< / p >
< p class = "whs3" > FaceX21 = MakeQuad(EdgeY21, EdgeZ211,
EdgeY22, EdgeZ221)< / p >
< p class = "whs3" > FaceY111 = MakeQuad(EdgeX111, EdgeZ111,
EdgeX112, EdgeZ211)< / p >
< p class = "whs3" > FaceY121 = MakeQuad(EdgeX121, EdgeZ121,
EdgeX122, EdgeZ221)< / p >
< p class = "whs3" > FaceZ11 = MakeQuad(EdgeX111, EdgeY11,
EdgeX121, EdgeY21)< / p >
< p class = "whs3" > FaceZ12 = MakeQuad(EdgeX112, EdgeY12,
EdgeX122, EdgeY22)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # create a solid< / p >
< p class = "whs3" > Block = MakeHexa(FaceX11, FaceX21, FaceY111,
FaceY121, FaceZ11, FaceZ12)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # create a compound< / p >
< p class = "whs3" > box = MakeCompound([Block])< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # add in the study< / p >
< p class = "whs3" > box_id = addToStudy(box, " Box compound" )< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # create hexahedral mesh
on the box< / p >
< p class = "whs3" > hexa = smesh.Mesh(box, " Box compound
: hexahedrical mesh" )< / p >
< p class = "whs3" > algo = hexa.Segment()< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # define " NumberOfSegments"
hypothesis to cut the edge in a fixed number of segments< / p >
< p class = "whs3" > algo.NumberOfSegments(4)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # creates a quadrangle
2D algorithm for the faces< / p >
< p class = "whs3" > hexa.Quadrangle()< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # construct a submesh with
a local hypothesis< / p >
< p class = "whs3" > algo = hexa.Segment(EdgeX111)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # define " Arithmetic1D"
hypothesis to cut an edge in several segments with increasing arithmetic
length < / p >
< p class = "whs3" > algo.Arithmetic1D(1, 4)< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # define " Propagation"
hypothesis that propagates all other hypothesis on all edges on the opposite
side in case of quadrangular faces< / p >
< p class = "whs3" > algo.Propagation()< / p >
< p class = "whs4" > < / p >
< p class = "whs4" > # compute the mesh< / p >
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< p class = "whs3" > hexa.Compute() < / p >
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< p class = "whs3" > < / p >
< h3 > < a name = bookmark2 > Editing of a mesh< / a > < / h3 >
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< p > Attention! This script was written using old approach, based on direct usage of SMESH idl interface. To be updated for version 3.2.1 to use < b > smesh< / b > package.
< br >
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< p class = "whs3" > < / p >
< p class = "whs3" > < span style = "font-family: 'Lucida Console', monospace;" > import
salome< / span > < / p >
< p class = "whs3" > import geompy< / p >
< p class = "whs3" > import SMESH< / p >
< p class = "whs3" > import StdMeshers< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > smesh = salome.lcc.FindOrLoadComponent(" FactoryServer" ,
" SMESH" )< / p >
< p class = "whs3" > smesh.SetCurrentStudy(salome.myStudy)< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > box =
geompy.MakeBox(0., 0., 0., 20., 20., 20.)< / p >
< p class = "whs3" > idbox = geompy.addToStudy(box, " box" )< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > subShapeList = geompy.SubShapeAll(box,
geompy.ShapeType[" EDGE" ])< / p >
< p class = "whs3" > edge =
subShapeList[0]< / p >
< p class = "whs3" > name =
geompy.SubShapeName(edge, box)< / p >
< p class = "whs3" > idedge = geompy.addToStudyInFather(box,
edge, name)< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > box =
salome.IDToObject(idbox)< / p >
< p class = "whs3" > edge = salome.IDToObject(idedge)< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > hyp1 = smesh.CreateHypothesis(" NumberOfSegments" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs3" > hyp1.SetNumberOfSegments(3)< / p >
< p class = "whs3" > hyp2 = smesh.CreateHypothesis(" MaxElementArea" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs3" > hyp2.SetMaxElementArea(10)< / p >
< p class = "whs3" > hyp3 = smesh.CreateHypothesis(" Arithmetic1D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs3" > hyp3.SetLength(1,1)< / p >
< p class = "whs3" > hyp3.SetLength(6,0)< / p >
< p class = "whs3" > hyp4 = smesh.CreateHypothesis(" Propagation" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > algo1 = smesh.CreateHypothesis(" Regular_1D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs3" > algo2 = smesh.CreateHypothesis(" MEFISTO_2D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > mesh = smesh.CreateMesh(box)< / p >
< p class = "whs3" > mesh.AddHypothesis(box,hyp1)< / p >
< p class = "whs3" > mesh.AddHypothesis(box,hyp2)< / p >
< p class = "whs3" > mesh.AddHypothesis(box,algo1)< / p >
< p class = "whs3" > mesh.AddHypothesis(box,algo2)< / p >
< p class = "whs3" > mesh.AddHypothesis(edge,hyp3)< / p >
< p class = "whs3" > mesh.AddHypothesis(edge,hyp4)< / p >
< p class = "whs3" > mesh.AddHypothesis(edge,algo1)< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > smesh.Compute(mesh,box)< / p >
< p class = "whs3" > salome.sg.updateObjBrowser(1)< / p >
< p class = "whs3" > < / p >
< p class = "whs5" > # remove a hypothesis< / p >
< p class = "whs3" > mesh.RemoveHypothesis(edge,hyp4)< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > smesh.Compute(mesh,box)< / p >
< p class = "whs3" > salome.sg.updateObjBrowser(1)< / p >
< p class = "whs3" > < / p >
< p class = "whs5" > # change the value
of the hypothesis< / p >
< p class = "whs3" > hyp2.SetMaxElementArea(2)< / p >
< p class = "whs3" > mesh.AddHypothesis(box,hyp2)< / p >
< p class = "whs3" > < / p >
< p class = "whs3" > smesh.Compute(mesh,box)< / p >
< p class = "whs3" > salome.sg.updateObjBrowser(1) < / p >
< p class = "whs4" > < / p >
< h3 > < a name = bookmark3 > Export of a Mesh< / a > < / h3 >
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< p > Attention! This script was written using old approach, based on direct usage of SMESH idl interface. To be updated for version 3.2.1 to use < b > smesh< / b > package.
< br >
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< p class = "whs4" > < / p >
< p class = "whs1" > < span style = "font-family: 'Lucida Console', monospace;" > import
salome< / span > < / p >
< p class = "whs1" > import geompy< / p >
< p class = "whs1" > import StdMeshers< / p >
< p class = "whs1" > smesh = salome.lcc.FindOrLoadComponent(" FactoryServer" ,
" SMESH" )< / p >
< p class = "whs1" > smeshgui = salome.ImportComponentGUI(" SMESH" )< / p >
< p class = "whs1" > smeshgui.Init(salome.myStudyId);< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # create a box< / p >
< p class = "whs1" > box = geompy.MakeBox(0.,
0., 0., 100., 200., 300.)< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # add the box to the study< / p >
< p class = "whs1" > idbox = geompy.addToStudy(box,
" box" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # create a hypothesis< / p >
< p class = "whs1" > print " --------------------------
create Hypothesis" < / p >
< p class = "whs1" > print " --------------------------
NumberOfSegments" < / p >
< p class = "whs1" > numberOfSegments
= 7< / p >
< p class = "whs1" > hypNbSeg = smesh.CreateHypothesis(" NumberOfSegments" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > hypNbSeg.SetNumberOfSegments(numberOfSegments)< / p >
< p class = "whs1" > print hypNbSeg.GetName()< / p >
< p class = "whs1" > print hypNbSeg.GetId()< / p >
< p class = "whs1" > print hypNbSeg.GetNumberOfSegments()< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(hypNbSeg),
" NumberOfSegments_10" )< / p >
< p class = "whs1" > print " --------------------------
MaxElementArea" < / p >
< p class = "whs1" > maxElementArea =
800< / p >
< p class = "whs1" > hypArea = smesh.CreateHypothesis(" MaxElementArea" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > hypArea.SetMaxElementArea(maxElementArea)< / p >
< p class = "whs1" > print hypArea.GetName()< / p >
< p class = "whs1" > print hypArea.GetId()< / p >
< p class = "whs1" > print hypArea.GetMaxElementArea()< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(hypArea),
" MaxElementArea_500" )< / p >
< p class = "whs1" > print " --------------------------
MaxElementVolume" < / p >
< p class = "whs1" > maxElementVolume
= 900< / p >
< p class = "whs1" > hypVolume = smesh.CreateHypothesis(" MaxElementVolume" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > hypVolume.SetMaxElementVolume(maxElementVolume)< / p >
< p class = "whs1" > print hypVolume.GetName()< / p >
< p class = "whs1" > print hypVolume.GetId()< / p >
< p class = "whs1" > print hypVolume.GetMaxElementVolume()< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(hypVolume),
" MaxElementVolume_500" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # create algorithms< / p >
< p class = "whs1" > print " --------------------------
create Algorithms" < / p >
< p class = "whs1" > print " --------------------------
Regular_1D" < / p >
< p class = "whs1" > regular1D = smesh.CreateHypothesis(" Regular_1D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(regular1D),
" Wire Discretisation" )< / p >
< p class = "whs1" > print " --------------------------
MEFISTO_2D" < / p >
< p class = "whs1" > mefisto2D = smesh.CreateHypothesis(" MEFISTO_2D" ,
" libStdMeshersEngine.so" )< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(mefisto2D),
" MEFISTO_2D" )< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # initialize a mesh with
the box< / p >
< p class = "whs1" > mesh = smesh.CreateMesh(box)< / p >
< p class = "whs1" > smeshgui.SetName(salome.ObjectToID(mesh),
" MeshBox" )< / p >
< p class = "whs1" > < / p >
< p class = "whs2" > # add the hypothesis to
the box< / p >
< p class = "whs1" > print " --------------------------
add hypothesis to the box" < / p >
< p class = "whs1" > mesh.AddHypothesis(box,hypNbSeg)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,hypArea)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,hypVolume)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,regular1D)< / p >
< p class = "whs1" > mesh.AddHypothesis(box,mefisto2D)< / p >
< p class = "whs2" > < / p >
< p class = "whs2" > # compute the mesh< / p >
< p class = "whs1" > print " --------------------------
compute the mesh of the box" < / p >
< p class = "whs1" > ret = smesh.Compute(mesh,box)< / p >
< p class = "whs1" > print ret< / p >
< p class = "whs1" > if ret == 0:< / p >
< p class = "whs1" > print
" probleme when computing the mesh" < / p >
< p class = "whs1" > salome.sg.updateObjBrowser(1)< / p >
< p class = "whs1" > mesh.ExportMED(" /tmp/meshMED.med" ,0)< / p >
< p class = "whs2" > < / p >
< p class = "whs4" > < / p >
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